Renesas 70V3379S4BC

Overview

70V3379S4BC from Integrated Device Technology is a high-speed 32K × 18-bit synchronous dual-port static RAM with pipelined output, true dual-port architecture enabling simultaneous access to the same memory location, 7.5 ns clock cycle time (133 MHz), and selectable 3.3 V or 2.5 V I/O interface per port. It is used in high-bandwidth packet buffering, telecommunications switching fabric, and real-time DSP co-processor memory subsystems.

For engineers reviewing the 70V3379S4BC datasheet, 70V3379S4BC pinout, 70V3379S4BC application, or 70V3379S4BC equivalent, key selection criteria include pipelined read latency, independent port voltage configuration via OPTL/OPTR, counter-enabled burst addressing, dual chip enable for depth expansion, and industrial-grade thermal stability up to +85°C.

Technical Context

The 70V3379S4BC implements fully synchronous operation on both left and right ports, with all control, address, and data inputs registered on the rising edge of CLKL/CLKR. Its pipelined output mode introduces one-cycle latency between clock and valid data output, enabling deterministic timing at 133 MHz with 4.2 ns clock-to-data (tCD2) max.

Each port features independent power domain control: VDD remains fixed at 3.3 V for core logic, while VDDQL/VDDQR are configurable to 3.3 V or 2.5 V based on OPTL/OPTR logic levels-allowing mixed-voltage system interfacing without level shifters. The integrated address counter (CNTENL/CNTRSTL and CNTENR/CNTRSTR) supports automatic sequential addressing during burst transfers.

Key Specifications

Pinout & Package

70V3379S4BC is packaged in a 256-pin Ball Grid Array (BC256/BCG256) with 1.0 mm ball pitch and 17 mm × 17 mm footprint. Pin functions are electrically symmetric across left/right ports, supporting identical signal routing for both sides in PCB layout.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-port SRAM applications.

Compared with CY7C1375BV33-167AXC and AS7C33256B-15JIN, the 70V3379S4BC uniquely delivers per-port I/O voltage selection and guaranteed pipelined latency-making it optimal for mixed-voltage, high-determinism embedded systems.

Availability

70V3379S4BC is available at Aetrix Electronics and suitable for telecom switching fabric, DSP co-processor memory, and industrial PLC data logging requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 70V3379S4BC includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Integrated Device Technology (IDT), now part of Renesas Electronics, is a fabless semiconductor company specializing in timing, memory interface, RF, and power management ICs for communications, computing, and industrial markets.

The 70V3379S4BC belongs to IDT's high-speed synchronous dual-port SRAM product line, engineered specifically for deterministic, low-latency memory sharing between independent clock domains in networking and signal processing systems.

FAQ

What is the maximum operating frequency of the 70V3379S4BC?

The 70V3379S4BC supports a maximum clock frequency of 133 MHz, corresponding to a minimum clock cycle time (tCYC2) of 7.5 ns in pipelined mode. This specification is guaranteed across the full industrial temperature range (–40°C to +85°C) and applies to both left and right ports independently.

Does the 70V3379S4BC support independent I/O voltage levels on its two ports?

Yes, the 70V3379S4BC supports independent I/O voltage configuration: OPTL sets VDDQL to 3.3 V or 2.5 V for the left port, and OPTR sets VDDQR accordingly for the right port. This allows one port to interface with a 3.3 V ASIC while the other connects to a 2.5 V FPGA-without external level shifters.

How does the address counter function in the 70V3379S4BC?

The 70V3379S4BC includes dedicated counter control signals (CNTENL/CNTRSTL and CNTENR/CNTRSTR) that enable automatic address increment per clock cycle when CNTEN = LOW. CNTRST resets the counter to address 0. This feature reduces CPU overhead in burst-oriented applications like packet streaming or FFT data loading.

What package type is used for the 70V3379S4BC?

70V3379S4BC is supplied in a 256-pin Ball Grid Array (BGA) package designated BC256 or BCG256, with 1.0 mm ball pitch and 17 mm × 17 mm body size. This package provides high pin density and thermal performance suitable for high-speed, high-power memory applications.

Can the 70V3379S4BC be used in depth-expansion configurations without additional logic?

Yes, the 70V3379S4BC integrates dual chip enables (CE0L/CE1L and CE0R/CE1R) per port, enabling direct depth expansion of multiple devices using only these signals-no external address decoding or logic gates are required. Truth Table I in the datasheet defines the enable combinations for port activation.